Improvement in padlocks



` To all whom itmay concern:

Be it known` that I, EDWARD L. GAYLORD, of

andthe spring which operates. it;

i mma' @smeg @wat dimite.

" EDWARD LJ eAYLCnD, or TnR'nYvrLLn, CONNECTICUT.

` Letters Patent No. 104,572, dated .Tune 21, 1870.

rMPRovnMENT 1N PADLoCKs.

The Schedule referred to in these Letters Patent and.4 making paift of the same.

Ierryville,in `the county `of Litchfield 4and State of Connecticut, have invented a newand Improved Pad- Y lock; and 1 do hereby declare that thefollowing is a `full, clear, and exact description of the same, refer-V ence beinghad to the accompanying drawing forming a part of this speciication, in which Figure 1 is a plan view when the upper plate of the `case is removed;` l 1 a Figure 2 is a transverse section, showingr the lapjoint of the inclosing plates;

` Figure 3 is a detachedview of thcrecessed shackle Figure 4 is a plan of the key;` and Figure 5, a part of a section similar to fig 2, showiig the tongue-and-grodi `joint of the inclosingp ates. l

This invention consists in the combination of a flat spring coiled aronnda stump projecting upward from the inside of the case, with a shackle recessed at its buttso' as to inclose the spring, an armof `the latter' projecting through a slot in the wall of thel recessed butt, and operating so as to throw the shackle open I,when the tumblers are withdrawn from it, and hold it open until it is 'shut by direct pressure, the dimensions ol' the recess being such as to leave suicient thickness in thebutlt to form a firm bearing on its pivot. i -The inventionalso consists in the combination with the tumblers of each set,.ot` an interposed tumblei` of thin metal, and of a spring'of a width equal to the combined thickness of all the tumblers bearing against a such interposed tumbler, and of separate springs, each of a width equal t-o the thickness of one tumbleryand each placed opposite a tumbler and bearing upon the widerspring aforesaid, alltlie tumblers and springs operating together in such -inanner as tolrender it a extremely diicult to piek the lock.

In the drawinga a are the two plates ofl of the padlockis composed.

b b, tig. 2, the lapjoints at the edges of the plates. o, g. 5, the' tonguefand-groove"joint, which may be used as a substitute for the lap. i

which 'the inclosin'g case ne'ss f both tuirihlers and the interposed catch, bear against the rear edges of the catches, and separate spring plates i bear against the tumbler-s severally. In fig. 4-

lc lo are recesses between the wards of the key, into which the tumbler-catch projects.

For picking this lock the artist would be obliged t use a stem having a bit suliiciently thin to pass between the tumblers d, and yet sufiiciently-strong to press back the three springs l1. i t, requirements which 'it is hardly possible to unit-e in one bit.

In g. 3 lis a recess in thebutt of the shackle, in which is coiled a spring, m, around the pin 'n on which the shackle turns.

The spring throws the shackle out of the lock as soon as the key turns back thc tumblers, and holds the shackle open and out of the way until it is locked again on being pressed between the tumblers.

o is the notch in thebutt of the shackle, which re ceives the heads of the adjacent tumblers if the latter `bc"throi`vn 'too far back by one tampering with the lock, and thus prevents the shackle from yiu'g open when the tumblers are withdrawn from its head.

`Having thus described my invention,

What I claim as new, and desire to secure by Letters Patent, is`` l. The combination of the fiat spring m, coiled varound the pin a, with the shackle, provided with` the recess' l and notch o, and with the tumblers d, in thc manner and for the purpose specified.

2. rIhe combination of the tumbiers al o with the springs h fi i, in the manner and for the objects spec- 

